Personally, I think Ballmer is going to be around for a long time but, who knows, maybe Windows 8 really is going to be a make-or-break milestone for Microsoft's CEO. What do you think? "This is going to be his defining moment," said technology industry analyst Patrick Moorhead of Moor Insights & Strategy. Ballmer's "legacy will be looked at as what he did or didn't do with Windows 8. If Windows 8 is not a success, a lot of people will be looking for Microsoft to make a change at the CEO level."